Question

Before anyone comments, I must use HSQLDB RDBMS; it’s for university java project. My question is how would I get list of invoices created in last 30 days

CREATE TABLE Invoices(
    rid INTEGER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    invoicedate TIMESTAMP NOT NULL);

Answer 1

You could use HSQL’s dateadd function:

select  *
from    Invoices
where   invoicedate > dateadd('day', -30, CURRENT_DATE)